Sandra Milligan is Director and Principal Fellow of the Assessment Research Centre at the Melbourne Graduate School of Education, University of Melbourne. Sandra’s current research interests focus on assessment, micro-credentialing and warranting of hard-to-assess learning. Her most recent award-winning research examined opportunities for use of ‘big data’ and developmental assessment approaches on digital learning platforms, to support assessment of higher-order learning skills. The skills, including so called ‘21st Century skills’, or learning skills, have hitherto been difficult for classroom teachers to assess. Sandra has an unusually wide engagement with the education industry, and in educational research. Originally a teacher of science and mathematics, she is also a former Director of Curriculum in an Australian state education department, and has held senior research, management and governance positions in a range of educational organisations, including government agencies, not-for-profits, small start-up businesses and large, listed, international corporations. She was co-founder of The Good Universities Guide series, and has a background in technology commercialisation in education. She is the Convenor of a Melbourne University MOOC targeting professional learning for teachers in the area of assessment and teaching of 21C skills, which has to date has enrolled over 30,000 teachers worldwide.